0install 2.0 is out today. Zero Install is a decentralised cross-platform software installation system, allowing software developers to publish programs directly from their own websites, while still supporting shared libraries, automatic updates, dependency handling and digital signatures. It complements, rather than replaces, the OS' package management. Departing from its traditional use of installing desktop applications, many of the new features were driven by requirements from the Ryppl project, which is using 0install as the package manager in a modular build system for C++ projects.